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Mercury removal sorbent

a sorbent and mercury technology, applied in the field of mercury removal sorbent, can solve the problems of low capacity of adsorbent, affecting the health and mental acuity of young children and fetuses, and most of these heavy metals are toxic to humans and animals, and achieve the effect of high sorbent capacity

Inactive Publication Date: 2008-12-04
CROSS JOSEPH B +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]It is an object of the present invention to provide an improved vanadium material with a high capacity for sorbing heavy metals and heavy metal compounds.

Problems solved by technology

Most of these heavy metals are toxic to humans and animals.
In particular, elemental mercury and mercury compounds such as mercury chlorides are thought to compromise the health and mental acuity of young children and fetuses.
While a variety of adsorbents are available for capture of heavy metals (in particular mercury), these adsorbents tend to have low capacities and are easily deactivated by other components in the gas stream, such as sulfur oxides.

Method used

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  • Mercury removal sorbent
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Examples

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example

[0033]The following example illustrates preferred sorbent materials and methods of making the same in accordance with the present invention. This example should not be taken as limiting the scope of the present invention in any way.

[0034]In this example, a sorbent material according to the present invention was prepared by first dissolving 51.4 g ammonium metavanadate (NH4VO3) in 440 g of oxalic acid. In order to maintain the vanadium in its +5 oxidation state (indicated by a reddish color), hydrogen peroxide was added drop wise to the solution (approximately 120 drops were used). The NH4VO3 solution was then mixed with 200 g of ZrO2 in four steps thereby impregnating the NH4VO3 onto the ZrO2 by incipient wetness. In each step, 125 g of the NH4VO3 solution was added and the material dried at 248° F. (120° C.) for one hour before beginning the next step. Next, 20 g aliquots of the material were calcined at 45-degree increments from 572-932° F. (300-500° C.).

[0035]Two aliquots were te...

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Abstract

A sorbent composition comprising a vanadium compound and a ZrO2 support material is disclosed. Methods of making and using the composition to remove heavy metals or heavy metal containing compounds from a fluid stream are also provided. Such methods are particularly useful in the removal of mercury and mercury compounds from flue gas streams produced from the combustion of hydrocarbon-containing materials such as coal and petroleum fuels.

Description

[0001]The invention relates to a composition and method for removing heavy metal contaminants from fluid streams. In one aspect, the invention relates to a composition for sorbing heavy metal contaminants and a method of preparing such composition. In yet another aspect, the invention relates to a process for removing heavy metal contaminants, such as mercury and mercury compounds, from flue gas streams produced from the combustion of hydrocarbon-containing materials.BACKGROUND OF THE INVENTION[0002]Heavy metals are released during the combustion process of many fossil fuels and / or waste materials. These heavy metals include, for example, arsenic, beryllium, lead, cadmium, chromium, nickel, zinc, mercury, and barium. Most of these heavy metals are toxic to humans and animals. In particular, elemental mercury and mercury compounds such as mercury chlorides are thought to compromise the health and mental acuity of young children and fetuses.[0003]Furthermore, there is every indication...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01J20/06
CPCB01D53/64B01D53/8665B01D2255/20715Y10S210/914B01D2257/602B01J20/20B01D2255/20723
Inventor CROSS, JOSEPH B.JOHNSON, MARVIN M.SUGHRUE, II, EDWARD L.DODWELL, GLENN W.YAO, JIANHUA
Owner CROSS JOSEPH B
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